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Updated: Aug 1, 2026

Transcutaneous Microcirculatory Imaging in Preterm Neonates
Published on: December 31, 2015
[Growth curves for premature infants during the 1st year of life]
M A Peñuela-Olaya1, L A Fernández-Carrocera, M Velazco-Pasillas
1Departamento de Seguimiento Pediátrico, Instituto Nacional de Perinatología, México, D.F.
Insights
Premature infants show distinct growth patterns in their first year. Specific growth charts are essential for monitoring premature babies, as their growth rate differs from full-term infants.
Area of Science:
- Pediatrics
- Neonatology
- Human Growth and Development
Background:
- Premature infants exhibit unique growth trajectories compared to full-term neonates.
- Accurate anthropometric monitoring is crucial for assessing the health and development of premature infants.
Purpose of the Study:
- To establish specific anthropometric growth curves for premature infants during their first 12 months of life.
- To compare the growth velocity and patterns of premature infants with those of full-term infants.
Main Methods:
- Longitudinal anthropometric evaluation of 107 premature newborns over their first year.
- Measurement of weight, height, and various perimeters (cephalic, thoracic, abdominal, bronchial).
- Data presented in percentiles (10th, 50th, and 90th) for each variable.
Main Results:
- Premature infants demonstrated a symmetrical logarithmic growth pattern.
- The highest growth rate occurred in the first six months, decreasing in the second half of the year.
- By 12 months, premature infants reached the 50th percentile for weight, height, and cephalic perimeter compared to full-term infants.
Conclusions:
- Specific growth curves for premature infants are vital due to their different growth speed and rhythm.
- Premature infants exhibit significantly faster growth rates for weight and height compared to full-term infants in the first year.
- These findings underscore the need for tailored growth monitoring tools for the premature population.
Abstract:
A 107 newborn premature children were anthropometrically evaluated during the first 12 months of their lives at the Growth Clinic of the National Institute of Perinatology in Mexico City. The study was longitudinal and included variables such as weight, height, cephalic, thoracic, abdominal and bronchial perimeters. The data are show in percentiles of 10, 50 and 90 for each variable. A symmetrical logarithmic behavior throughout the entire curve was seen with each of the six indicators evaluated, whose greatest percentage increase within the growth rate was generally seen during the first semester, decreasing during the second. It was seen that once the child reaches one, the premature infant reaches the full-term child (50 percentile) in weight, height and cephalic perimeter. In addition, the average speed of growth was four times greater for weight, two times greater for height and similar for the cephalic perimeter of the premature child with respect to the full-term infant. We conclude that it is useful to count on specific growth curves for premature children since their speed and rhythm of growth are different than for the full-term child during the first year of life.
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